// Copyright 2018 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// This software (KWDB) is licensed under Mulan PSL v2.
// You can use this software according to the terms and conditions of the Mulan PSL v2.
// You may obtain a copy of Mulan PSL v2 at:
//          http://license.coscl.org.cn/MulanPSL2
// THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
// EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
// MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
// See the Mulan PSL v2 for more details.

// +build darwin

package status

import (
	"context"

	"github.com/lufia/iostat"
)

func getDiskCounters(context.Context) ([]diskStats, error) {
	driveStats, err := iostat.ReadDriveStats()
	if err != nil {
		return nil, err
	}

	output := make([]diskStats, len(driveStats))
	for i, counters := range driveStats {
		output[i] = diskStats{
			readBytes:      counters.BytesRead,
			readCount:      counters.NumRead,
			readTime:       counters.TotalReadTime,
			writeBytes:     counters.BytesWritten,
			writeCount:     counters.NumWrite,
			writeTime:      counters.TotalWriteTime,
			ioTime:         0, // Not reported by this library.
			weightedIOTime: 0, // Not reported by this library.
			iopsInProgress: 0, // Not reported by this library. (#27927)
		}
	}

	return output, nil
}
